Stand under a Smith machine bar with feet about shoulder-width apart and bar resting across your upper back. Unrack the bar and lower your body by bending at the hips and knees, keeping your torso upright and core braced. Descend until your thighs are near parallel to the floor, then push through your heels to return to standing. Perform with controlled tempo and good form throughout.
The Smith machine squat trades the balance demands of a free barbell for a fixed vertical path, which changes what the exercise is for: it becomes a quad and glute loader you can push hard without a spotter, not a substitute for learning to squat. Program 3 to 4 sets of 8 to 15 reps as squat-day volume after free squats, as the main squat on machine-only days, or for lifters returning from injury who need a predictable bar path. The rotating hooks mean any failed rep can be racked with a flick of the wrists, which makes it one of the safest places to take legs near failure.
The fixed path is also the built-in adjustment: because the bar cannot drift, you can place the feet 20 to 30 cm in front of the bar line and sit straight down, which keeps the torso upright and drives the quads hard, a position impossible with a free bar. Feet directly under the bar reproduces a more conventional squat. Descend to at least parallel, avoid slamming into lockout, and progress in 2.5 to 5 kg jumps.
They build the legs nearly as well and are easier to push safely, but they train none of the balance and trunk control that make the free squat valuable. Keep the barbell version as the foundation if you can squat, and use the Smith for extra volume or when no spotter is available.
Slightly in front of the bar line for a quad-focused, upright squat, or under the bar for a conventional pattern. Never behind the bar; that folds the torso forward against a track that will not move with you.
No. The forward-foot position actually resembles a supported sissy squat, which loads the quads through a long, knee-friendly range. Sore knees usually mean too much load too soon, not a flaw in the machine.
Log your smith squat sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.